Pine tar paste is a natural and simple way to help heal pruning wounds and protect from various trunk, cryptogamic and bacterial diseases. Wound protectants made of pine tar such as InocBloc® have proven their efficiency, particularly on vines, kiwi trees, avocado and apple trees.
Pine tar pruning pastes are the most efficient to control many diseases, according to various studies
In 2010, the French Vine & Wine Institute (IFV) made a study during two years to compare the effectiveness of different types of coastings (Escudo, Pine tar, wood stain, vegetal oil and resin) against eutypiosis trunk disease :
Outstanding results
Effectiveness of wound protectants against eutypiosis, 15 days after protection.
“Compared to Escudo (...) which was banned because of its toxicity, pine tars are equally effective, and even more when the wounds are subjected to high rain levels. The other products such as stains or those made of vegetable oils and resins, show almost no efficiency. Even if visually these different stains look more resistant than pine tars several months after the protection, they do not offer the same protection level.”
In 2016, Plant & Food Research has conducted a trial comparing the effect of 9 different products including pine tar (InocBloc®), cooper and other wound protectants on PSA, the kiwi fruit tree disease caused by a bacteria. It appeared that InocBloc was the most efficient product to protect kiwi trees after winter and spring pruning :
In 2018, other peruvian research center Fitonsanidad Peru has proved pine tar efficiency over Lasiodiplodia theobromae fungus responsible for various diseases in cocoa, mango, grapes, papaya, and even citrus trees… the product was compared with two other pruning pasted and obtained better results in various conditions.
InocBloc® from Grosafe® is the only organic certified pruning paste on the market
New Zealander company Grosafe has developed and obtained an organic certification for this pine tar pruning paste. It can be used on all fruit and ornemental trees, but also on grapevine to prevent trunk diseases. Its brush facilitates application on pruning wounds.
Moldavian company Agrodor has also been commercializing the wound protectant to apple tree orchards for many years